Miner&#39;s blasting-box.



J. BEENEOK.

MINERS BLASTING BOX.

APPLICATION FILED DEO.11, 1912.

1,1 14.096. Patented 001;. 20, 1914.

2 SHBETS'SHEET 1.

j, I l I WITNESSES [N VE N T OR J. BEENECK.

MINBRS BLASTING BOX.

APPLICATION FILED DEO.11,1912.

1 1 1 4,096. Patented 001;. 20, 1914.

2 SHEETS-SHEET 2.

WITNESSES i I Q 5 INVENTOR E 1 fzwmcfi THE NORRIS PETERS Ca, FHOTD LITHOH WASHING A [luring JOSEPH BEENEGK, OF NANTICOKE, PENNSYLVANIA.

MINERS BLASTING-BOX.

Specification of Letters Patent.

Patented Oct. 20, 1914..

Application filed December 11, 1912. Serial No. 736,150.

To all whom it may concern Be it known that I, JosnrI-I Bnnnncx, citizen of the United States, residing at Nanticoke, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Miners Blasting-Boxes, of which the fol lowing is a specification.

My invention relates to new and useful improvements in blasting boxes for miners and more particularly to safety blasting boxes and the object of my invention is to provide av battery containing receptacle or casing having external binding posts for connection with the wires leading to the cartridge or charge to be exploded and a circuit wi hin the casing including the batteries and connected to the inner ends of the binding posts.

A further object of my invention is to provide the above described circuit with a pair of normally open circuit closers, one of which can be closed only by the employ ment of a certain key, this circuit closer including in its construction a lock having a reciprocating bolt which forms the movable member of the circuit closer. And a still further object of my invention is to so construct this lock that when in active position to close the circuit, the key cannot be removed from the lock, thereby avoiding all danger of leaving the circuit closer in operative position by accident.

lVith these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawings, and then specificially pointed out in the claim which is attached to and forms a part of this application.

In the drawings: Figure 1 is a perspective view of my improved blasting box; Fig. 2 is a top plan view of the same with the cover removed; Fig. 8 is a section on the line 33 of Fig. 2, showing certain details of wiring and circuit closer construction; Fig. 4 is a fragmentary elevation of the lock operated circuit closer looking at the same from within the casing; Fig. 5

vis a diagrammatic view, showing the wiring of my device.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The preferred embodiment of my invention includes a casing 10 preferably rectangular in shape which may be formed of wood or metal, but which is preferably formed of wood in order to avoid the necessity of insulating the binding posts and circuit closers from the casing. This casing is provided with a top or closure 11 secured in place by screws or other suitable fastening devices 12 and having a hanr ule 13 by which the blasting box may be conveniently carried from place to place.

The casing 10 is provided with a plurality of spaced apart, longitudinally extending walls 14 and with a transversely extending wall 15 providing a plurality of compartments 16, four of these compart ments being shown in the drawings, althoughit will. be understood that by increasing the number of partitions any de sired number of compartments may be provided. The outermost of the partitions H are preferably spaced from the walls of the casin g to provide room at the front for a circuit closing mechanism which willbe hereinafter more fully explained, and at the back for pliers or any other instruments which may be desired. The end walls of the easing carry blocks 17, preferably of resilient material to properly cushion dry cells 18 which are mounted one within each of the compartments 16, as clearly shown in Fig. 2 of the drawings.

Mounted in spaced relation upon the forward portion of the top or closure 11 of the blasting box, are spaced binding posts 19 and 20, while mounted upon the rear portion of the top, is a circuit closer 21 of conventional push button type, as clearly shown in Fig. 3 of the drawings. Secured to the inner face of the front wall of theeasing are vertically spaced apart binding posts 22 and 23 carrying longitudinally bowed leaf springs 24: and 25, respectively, the free ends of which are slightly spaced from each other, as best shown in Figs. 3 and 4- 0f the drawings. Secured to this front wall and adjacent the binding posts 22 and 23, is a lock indicated as a whole by the numeral 26 including a housing 27 and a reciprocally mounted bolt 28 adapted to be held in either retracted or extended position by a leaf spring 29 carried by the housing and engaging in one or the other of a pair of notches 30 formed in the bolt. This bolt is operated by a key 31, the ward 32 of which engages in a notch 33 also formed in the bolt. The front Wall of the casing is probined in a single cable, as shown at 47.

vided with the usual key receiving opening 84 through which the key may be inserted to the lock and a pin extends transversely of the lock housing in such a manner as to prevent the complete rotation of the key within the lock. This lock construction is clearly illustrated in Fig. 4 of the drawings and it will there be noted that the key may a be turned sufficiently to throw the bolt into active position in engagement with the spaced terminals of the springs 24 and 25, but may not be turned sufficiently to permit its withdrawal from the look. It therefore becomes necessary, in order to remove the key, to counterrotate the same which will of course, retract the bolt and break the circuit through the springs 24 and 25.

The wiring of the blasting box is extremely simple as will be apparent with reference to Fig. 5 of the drawings, this figure being taken in connection with Figs. 2 and 3 which show the wires in elevation. A plurality of conductor wires 36 connect the cells in series to provide a battery 37 and wires 38 and 39 connect the terminals of this battery to one terminal 40 of the circuit closer 21 and to the binding post 23, respectively. A wire 41 leads from the opposite terminal 42 of the circuit closer 21 to the binding post 20, while a wire 43 leads from the binding post 22 to the binding post 19.

In operation, the cartridge 44 or other charge to be exploded is applied in the usual manner and conductor wires 45 and 46 lead from the cartridge to the binding posts 19 and 20, said wires being preferably com- It will of course be understood that this cable 47 is of such length that the operator firing the blast will be at a safe distance therefrom. Then the blast is to be tired, the operator inserts the key 31 in the lock and turns the same to swing the bolt 28 in operative position and close the gap in the circuit between the spaced terminals of the springs 24 and 25. Upon pressing the push button of the circuit closer 21, the entire circuit is then closed and the charge exploded. It will therefore be apparent that the blasting box may be used only by one having the proper key and that inasmuch as the key cannot be removed from the lock, while the bolt is in active position, all danger of leaving the blasting box in such a manner that it may be employed without the key is avoided.

It will of course be understood that I do not wish in any way to limit myself to the the spirit of my invention.

Having thus described the invention, what is claimed as new is:

A blasting box including a casing, a battery carried by the casing, wires forming a circuit connected to the battery, said circuit being broken at two points, a circuit closer adapted to close the circuit at one of said points, a lock having a bolt projectable to close the circuit at the other of said points, said bolt acting as a conductor, and a key for operating the bolt, said key being withdrawable from the look only in the open circuit position of the bolt.

In testimony whereof I my signature in presence of two witnesses.

JOSEPH BEENEGK. 11. 3.

Witnesses STEPHEN J. Snnnrz, WM. J. BURNETT.

05 m of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Wash n on, 6- 

